A molding die for an injection molded part having a concave cavity site

Abstract

The application discloses a forming die of an injection molding part with a concave cavity position, and relates to the field of molds. A core-pulling slide block is movably arranged on a fixed mold. When a movable mold and the fixed mold are in a closed mold state, a first limiting column is located at one end of a first strip-shaped groove away from a forming part, and a second limiting column is located at one end of a second strip-shaped groove away from the forming part. During demolding, the core-pulling slide block moves away from the concave cavity position. After the first limiting column abuts against one end of the first strip-shaped groove close to the forming part and the second limiting column abuts against one end of the second strip-shaped groove close to the forming part, the core-pulling slide block drives the first core-pulling rod and the second core-pulling rod away from the concave cavity position. The first core-pulling rod and the second core-pulling rod with opposite inclined directions and movability are arranged on the core-pulling slide block. The moving direction of the first core-pulling rod and the second core-pulling rod is controlled through the movement of the core-pulling slide block, so that lateral core pulling of the concave cavity position can be realized, and interference problems are avoided.

Description

Technical Field

[0001] This invention relates to the technical field of molds, and in particular to a molding die for injection molded parts with recessed cavities. Background Technology

[0002] like Figure 1 The injection molded part 1 shown has a special cavity 1a. The cavity 1a has a folded edge 1b on one side or opposite sides of the opening. This makes the opening area smaller than the area of ​​the internal cross-section of the cavity. For demolding structures with special cavities like this, existing molds require lateral core pulling in multiple directions. Core pulling mechanisms need to be set in each direction for demolding. However, due to the limited space of the mold, setting multiple core pulling mechanisms will result in the spacing between each core pulling mechanism being too small, which is easy to cause interference. The structure is more complex and the assembly is more difficult. Utility Model Content

[0003] The main objective of this invention is to provide a molding die for injection molded parts with recessed cavities, aiming to solve the problems in the prior art.

[0004] To achieve the above objectives, the technical solutions of the present invention are as follows:

[0005] This invention discloses a molding die for an injection molded part with a concave cavity, comprising a moving mold, a fixed mold, and a core-pulling assembly, wherein the core-pulling assembly includes:

[0006] A core-pulling slider is movably mounted on the fixed mold. The core-pulling slider has a through first channel and a second channel, which are horizontally inclined in opposite directions. The core-pulling slider also has a first groove and a second groove, the first groove being connected to and parallel to the first channel, and the second groove being connected to and parallel to the second channel.

[0007] The first core-pulling rod is movably inserted into the first channel;

[0008] The first limiting post is disposed on the first core-pulling rod and located in the first strip groove;

[0009] The second core-pulling rod is movably inserted into the second channel;

[0010] The second limiting post is disposed on the second core-pulling rod and located in the second strip groove;

[0011] When the moving mold and the fixed mold are in the mold-closed state, the ends of the core-pulling slider, the first core-pulling rod and the second core-pulling rod together form the molding part of the injection molded part cavity. The first limiting post is located at the end of the first strip groove away from the molding part, and the second limiting post is located at the end of the second strip groove away from the molding part.

[0012] During the demolding process, the core-pulling slider moves away from the cavity. After the first limiting post abuts against the end of the first strip groove near the molding part and the second limiting post abuts against the end of the second strip groove near the molding part, the core-pulling slider drives the first core-pulling rod and the second core-pulling rod away from the cavity.

[0013] Compared with the prior art, the present invention discloses a molding die for an injection molded part with a concave cavity. A first core-pulling rod and a second core-pulling rod with opposite inclination directions are provided on the core-pulling slider. The movement direction of the first core-pulling rod and the second core-pulling rod can be controlled by the movement of the core-pulling slider, so as to realize the lateral core-pulling of the concave cavity. This simplifies the structure, reduces the assembly difficulty, saves mold space, and avoids interference problems.

[0014] Specifically, in this invention, the first limiting post on the first core-pulling rod and the second limiting post on the second core-pulling rod serve as the force-bearing connecting components for the core-pulling slider to drive the first and second core-pulling rods. At the beginning of demolding, the core-pulling slider moves away from the cavity, and the first and second core-pulling rods move closer to each other under the guidance of the first and second channels, respectively, so that the first and second core-pulling rods separate from the opposite sides of the cavity and avoid the folded edge at the opening. After the first limiting post abuts against the end of the first strip groove near the molding part and the second limiting post abuts against the end of the second strip groove near the molding part, the core-pulling slider drives the first and second core-pulling rods to move synchronously away from the cavity until the core-pulling slider, the first core-pulling rod, and the second core-pulling rod are completely disengaged from the cavity, completing the demolding action of the cavity.

[0015] In a preferred embodiment, the first core-pulling rod has a first through hole extending vertically; the second core-pulling rod has a second through hole extending vertically; the molding die for the injection molded part with the cavity further includes a limiting member, which is inserted into the first through hole and the second through hole respectively, wherein the limiting member has a stepped columnar structure, divided into an upper cylindrical part and a lower cylindrical part, the diameter of the upper cylindrical part is larger than the diameter of the lower cylindrical part, and the diameters of the first through hole and the second through hole match the diameter of the lower cylindrical part; the first limiting post and the second limiting post are formed by the upper cylindrical part.

[0016] In a preferred embodiment, the core-pulling assembly further includes two limiting cover plates, which are fixedly installed on the core-pulling slider. The two limiting cover plates are respectively located above the first strip groove and the second strip groove to close the first strip groove and the second strip groove.

[0017] In a preferred embodiment, both the first channel and the second channel have a polygonal cross-sectional shape.

[0018] In a preferred embodiment, the first core-pulling rod has two first arc-shaped recesses spaced apart; the line connecting the centers of the two first arc-shaped recesses is parallel to the length direction of the first core-pulling rod; the core-pulling assembly further includes a first spring-loaded plunger, which is mounted on the core-pulling slider and is used to engage with the two first arc-shaped recesses; when the first limiting post abuts against the end of the first strip groove near the forming part, the first spring-loaded plunger engages with one of the first arc-shaped recesses; when the first limiting post abuts against the end of the first strip groove away from the forming part, the first spring-loaded plunger engages with the other first arc-shaped recess.

[0019] In a preferred embodiment, the second core-pulling rod has two second arc-shaped recesses spaced apart; the center line connecting the two second arc-shaped recesses is parallel to the length direction of the second core-pulling rod; the core-pulling assembly further includes a second spring-loaded plunger, which is mounted on the core-pulling slider and is used to engage with the two second arc-shaped recesses; when the second limiting post abuts against the end of the second strip groove near the forming part, the second spring-loaded plunger engages with one of the second arc-shaped recesses; when the second limiting post abuts against the end of the second strip groove away from the forming part, the second spring-loaded plunger engages with the other second arc-shaped recess.

[0020] In a preferred embodiment, the fixed mold is provided with a T-shaped groove, and the bottom of the core-pulling slider has a T-shaped structure that cooperates with the T-shaped groove.

[0021] In a preferred embodiment, the core-pulling assembly further includes an inclined guide post, which is fixedly installed on the moving mold and passes through the core-pulling slider. The inclined guide post drives the core-pulling slider to move during the mold opening and closing process.

[0022] In a preferred embodiment, a water circulation circuit is provided inside the core-pulling slider, and the inlet and outlet of the water circulation circuit are located at the bottom of the core-pulling slider; both the inlet and outlet of the water circulation circuit are connected to L-shaped connectors, and water pipes are connected to the L-shaped connectors; two strip-shaped through slots are provided on the fixed mold, arranged side by side and spaced apart, for the installation of the L-shaped connectors and the water pipes.

[0023] In a preferred embodiment, the molding die for the injection molded part with the cavity further includes a straight ejector assembly for vertically ejecting the injection molded part; the straight ejector assembly includes a straight ejector pin and an ejector plate, the ejector plate is vertically movable and disposed below the fixed mold, the bottom of the straight ejector pin is fixed on the ejector plate, and the straight ejector pin passes through the fixed mold.

[0024] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0026] Figure 1 This is a structural diagram of an injection molded part with a recessed cavity.

[0027] Figure 2 This is a structural diagram of a molding die for an injection molded part with a concave cavity.

[0028] Figure 3 This is a structural diagram of the core-pulling assembly;

[0029] Figure 4 This is an exploded view of the core-pulling assembly;

[0030] Figure 5 It is a connection diagram of the water circulation loop, L-shaped connector, and water pipes;

[0031] Figure 6 This is a cross-sectional view showing the connection between the core-pulling assembly and the recessed cavity.

[0032] Figure 7 This is one of the motion diagrams illustrating the demolding process of the core-pulling component;

[0033] Figure 8 This is the second schematic diagram of the motion during the demolding process of the core-pulling component.

[0034] Explanation of reference numerals in the attached figures:

[0035] 2-Fixed mold, 21-T-shaped slide, 22-Strip groove, 3-Core-pulling slider, 31-First channel, 32-Second channel, 33-First strip groove, 34-Second strip groove, 35-Water circulation circuit, 4-First core-pulling rod, 42-First arc-shaped concave hole, 5-First limiting post, 6-Second core-pulling rod, 62-Second arc-shaped concave hole, 7-Second limiting post, 8-Limiting component, 81-Upper cylindrical part, 82-Lower cylindrical part, 9-Limiting cover plate, 10-First spring pin plug, 11-Second spring pin plug, 13-Angled guide post, 14-L-shaped connector, 15-Water pipe, 16-Straight ejector pin, 17-Ejector plate. Detailed Implementation

[0036] To better illustrate the present invention, the invention will now be described in further detail with reference to the accompanying drawings.

[0037] It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.

[0038] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0039] Combination Figures 1 to 8 As shown, this invention discloses a molding die for an injection molded part with a concave cavity, comprising a moving mold, a fixed mold 2, and a core-pulling assembly, wherein the core-pulling assembly includes:

[0040] The core-pulling slider 3 is movably mounted on the fixed mold 2. The core-pulling slider 3 has a through first channel 31 and a second channel 32. The first channel 31 and the second channel 32 are horizontally inclined and in opposite directions. The core-pulling slider 3 also has a first strip groove 33 and a second strip groove 34. The first strip groove 33 is connected to and parallel to the first channel 31, and the second strip groove 34 is connected to and parallel to the second channel 32.

[0041] The first core-pulling rod 4 is movably inserted into the first channel 31;

[0042] The first limiting post 5 is disposed on the first core-pulling rod 4 and located within the first strip groove 33;

[0043] The second core-pulling rod 6 is movably inserted into the second channel 32;

[0044] The second limiting post 7 is disposed on the second core-pulling rod 6 and located within the second strip groove 34;

[0045] When the moving mold and the fixed mold 2 are in the mold-closed state, the ends of the core-pulling slider 3, the first core-pulling rod 4 and the second core-pulling rod 6 together form the molding part of the injection molded part cavity. The first limiting post 5 is located at the end of the first strip groove 33 away from the molding part, and the second limiting post 7 is located at the end of the second strip groove 34 away from the molding part.

[0046] During the demolding process, the core-pulling slider 3 moves away from the cavity. After the first limiting post 5 abuts against the end of the first strip groove 33 near the molding part and the second limiting post 7 abuts against the end of the second strip groove 34 near the molding part, the core-pulling slider 3 drives the first core-pulling rod 4 and the second core-pulling rod 6 away from the cavity.

[0047] Compared with the prior art, the present invention discloses a molding die for an injection molded part with a concave cavity. A first core-pulling rod 4 and a second core-pulling rod 6 with opposite inclination directions are provided on the core-pulling slider 3. The movement direction of the first core-pulling rod 4 and the second core-pulling rod 6 is controlled by the movement of the core-pulling slider 3, which can realize the lateral core-pulling of the concave cavity. This simplifies the structure, reduces the assembly difficulty, saves mold space, and avoids interference problems.

[0048] Specifically, in combination Figure 7 and Figure 8 As shown, in this invention, the first limiting post 5 on the first core-pulling rod 4 and the second limiting post 7 on the second core-pulling rod 6 serve as the force-receiving connecting components for the core-pulling slider 3 to drive the first core-pulling rod 4 and the second core-pulling rod 6.

[0049] Combination Figure 7 As shown, at the beginning of demolding, the core-pulling slider 3 moves away from the cavity 1a. The first core-pulling rod 4 and the second core-pulling rod 6 move closer to each other under the guidance of the first channel 31 and the second channel 32, so that the first core-pulling rod 4 and the second core-pulling rod 6 are separated from the opposite sides of the cavity, and the first core-pulling rod 4 and / or the second core-pulling rod 6 avoid the folded edge 1b at the opening.

[0050] Combination Figure 8 As shown, after the first limiting post 5 abuts against the end of the first strip groove 33 near the molding part and the second limiting post 7 abuts against the end of the second strip groove 34 near the molding part, the core-pulling slider 3 drives the first core-pulling rod 4 and the second core-pulling rod 6 to move synchronously away from the cavity position until the core-pulling slider 3, the first core-pulling rod 4 and the second core-pulling rod 6 are completely disengaged from the cavity position, thus completing the demolding action of the cavity position.

[0051] In this invention, since the first core-pulling rod 4 needs to be inserted into the first channel 31 and the second core-pulling rod 6 needs to be inserted into the second channel 32, the first core-pulling rod 4 and the first limiting post 5 can only be installed as two separate parts, and the second core-pulling rod 6 and the second limiting post 7 can only be installed as two separate parts. However, the width of the first core-pulling rod 4 and the second core-pulling rod 6 is relatively narrow, only 10mm. In addition, the first limiting post 5 and the second limiting post 7 are subject to collision with the core-pulling slider 3, making it unsuitable to use a small-diameter threaded connection method. Therefore, this invention directly adopts a plug-in method to connect the first core-pulling rod 4 and the first limiting post 5, and to connect the second core-pulling rod 6 and the second limiting post 7. In this invention, combined with Figure 4 As shown, the first core-pulling rod 4 has a first through hole extending vertically; the second core-pulling rod 6 has a second through hole extending vertically; the molding die for the injection molded part with the cavity further includes a limiting member 8, which is inserted into the first through hole and the second through hole respectively. The limiting member 8 has a stepped columnar structure, divided into an upper cylindrical part 81 and a lower cylindrical part 82. The diameter of the upper cylindrical part 81 is larger than the diameter of the lower cylindrical part 82. The diameters of the first through hole and the second through hole match the diameter of the lower cylindrical part 82. The first limiting post 5 and the second limiting post 7 are formed by the upper cylindrical part 81. The first core-pulling rod 4 is connected to the first limiting post 5 by inserting it into the limiting member 8, and the second core-pulling rod 6 is connected to the second limiting post 7 by inserting it into the limiting member 8.

[0052] Furthermore, combined Figure 3 and Figure 4 As shown, the core-pulling assembly also includes two limiting cover plates 9, which are fixedly installed on the core-pulling slider 3. The two limiting cover plates 9 are respectively located above the first strip groove 33 and the second strip groove 34 to close the first strip groove 33 and the second strip groove 34, thereby restricting the first limiting post 5 from disengaging upward from the first core-pulling rod 4 and restricting the second limiting post 7 from disengaging upward from the second core-pulling rod 6.

[0053] In one embodiment, to prevent the first core-pulling rod 4 and the second core-pulling rod 6 from rotating and changing the shape of the molding part, the cross-sectional shape of the first channel 31 and the second channel 32 are both polygonal, such as triangular, quadrilateral, pentagonal, etc.

[0054] In one embodiment, combined with Figure 4As shown, the first core-pulling rod 4 has two spaced-apart first arc-shaped recesses 42; the center line connecting the two first arc-shaped recesses 42 is parallel to the length direction of the first core-pulling rod 4; the core-pulling assembly also includes a first spring pin plug 10, which is mounted on the core-pulling slider 3 and is used to engage with the two first arc-shaped recesses 42; when the first limiting post 5 abuts against the end of the first strip groove 33 near the forming part, the first spring pin plug 10 engages with one of the first arc-shaped recesses 42; when the first limiting post 5 abuts against the end of the first strip groove 33 away from the forming part, the first spring pin plug 10 engages with the other first arc-shaped recess 42; through the engagement of the first spring pin with the two first arc-shaped recesses 42, the position between the first core-pulling rod 4 and the core-pulling slider 3 is precisely locked, achieving a precise positioning function.

[0055] In one embodiment, combined with Figure 4 As shown, the second core-pulling rod 6 has two spaced-apart second arc-shaped recesses 62; the center line connecting the two second arc-shaped recesses 62 is parallel to the length direction of the second core-pulling rod 6; the core-pulling assembly also includes a second spring plunger 11, which is mounted on the core-pulling slider 3 and is used to engage with the two second arc-shaped recesses 62; when the second limiting post 7 abuts against the end of the second strip groove 34 near the forming part, the second spring plunger 11 engages with one of the second arc-shaped recesses 62; when the second limiting post 7 abuts against the end of the second strip groove 34 away from the forming part, the second spring plunger 11 engages with the other second arc-shaped recess 62; through the engagement of the second spring plunger 11 with the two second arc-shaped recesses 62, the position between the second core-pulling rod 6 and the core-pulling slider 3 is precisely locked, achieving a precise positioning function.

[0056] In one embodiment, combined with Figure 1 and Figure 2 As shown, the fixed mold 2 is provided with a T-shaped groove, and the bottom of the core-pulling slider 3 has a T-shaped structure that cooperates with the T-shaped groove to guide the movement of the core-pulling slider 3, so that the core-pulling slider 3 moves in a straight line.

[0057] In one embodiment, combined with Figure 1As shown, the core-pulling assembly also includes an inclined guide post 13, which is fixedly installed on the moving mold and passes through the core-pulling slider 3. The inclined guide post 13 drives the core-pulling slider 3 to move during the mold opening and closing process. When the mold opens, the moving mold moves upward relative to the fixed mold 2. During the upward movement of the moving mold and the inclined guide post 13, the inclined guide post 13 drives the core-pulling slider 3 to move away from the cavity position. When the mold closes, the moving mold moves downward relative to the fixed mold 2. During the downward movement of the moving mold and the inclined guide post 13, the inclined guide post 13 drives the core-pulling slider 3 to move closer to the cavity position 1a.

[0058] Furthermore, combined Figure 5 As shown, a water circulation circuit 35 is provided inside the core-pulling slider 3. The water circulation circuit 35 is formed by drilling holes in the core-pulling slider 3 to allow cold water to flow through it and cool the core-pulling slider 3. The inlet and outlet of the water circulation circuit 35 are located at the bottom of the core-pulling slider 3. Both the inlet and outlet of the water circulation circuit 35 are connected to L-shaped connectors 14, and water pipes 15 are connected to the L-shaped connectors 14. The fixed mold 2 is provided with two parallel and spaced strip-shaped through slots 22 for the installation of the L-shaped connectors 14 and the water pipes 15. With the above structure, the L-shaped connectors 14 and the water pipes 15 can reciprocate with the core-pulling slider 3.

[0059] In one embodiment, combined with Figure 1 As shown, the molding die for the injection molded part with the cavity also includes a straight ejector assembly for vertically ejecting the injection molded part; the straight ejector assembly includes a straight ejector pin 16 and an ejector plate 17, the ejector plate 17 is vertically movable and disposed below the fixed mold 2, the bottom of the straight ejector pin 16 is fixed on the ejector plate 17, the straight ejector pin 16 passes through the fixed mold 2, so that when the mold is opened, the ejector plate 17 drives the straight ejector pin 16 to rise and eject the injection molded part upward.

[0060] This invention is not limited to the above-described embodiments. If any modifications or variations to this invention do not depart from the spirit and scope of this invention, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this invention, then this invention also intends to include such modifications and variations.

Claims

1. A molding die for an injection molded part with a recessed cavity, comprising a moving mold, a fixed mold, and a core-pulling assembly, characterized in that, The core-pulling assembly includes: A core-pulling slider is movably mounted on the fixed mold. The core-pulling slider has a through first channel and a second channel, which are horizontally inclined in opposite directions. The core-pulling slider also has a first groove and a second groove, the first groove being connected to and parallel to the first channel, and the second groove being connected to and parallel to the second channel. The first core-pulling rod is movably inserted into the first channel; The first limiting post is disposed on the first core-pulling rod and located in the first strip groove; The second core-pulling rod is movably inserted into the second channel; The second limiting post is disposed on the second core-pulling rod and located in the second strip groove; When the moving mold and the fixed mold are in the mold-closed state, the ends of the core-pulling slider, the first core-pulling rod and the second core-pulling rod together form the molding part of the injection molded part cavity. The first limiting post is located at the end of the first strip groove away from the molding part, and the second limiting post is located at the end of the second strip groove away from the molding part. During the demolding process, the core-pulling slider moves away from the cavity. After the first limiting post abuts against the end of the first strip groove near the forming part and the second limiting post abuts against the end of the second strip groove near the forming part, the core-pulling slider drives the first core-pulling rod and the second core-pulling rod away from the cavity. The first core-pulling rod has a first through hole extending vertically; The second core-pulling rod has a second through hole extending vertically; The molding die for the injection molded part with the cavity further includes a limiting member, which is inserted into the first through hole and the second through hole respectively. The limiting member has a stepped columnar structure, divided into an upper cylindrical part and a lower cylindrical part. The diameter of the upper cylindrical part is larger than the diameter of the lower cylindrical part. The diameters of the first through hole and the second through hole match the diameter of the lower cylindrical part. The first limiting post and the second limiting post are formed by the upper cylindrical part. The first core-pulling rod has two first arc-shaped recesses spaced apart; the line connecting the centers of the two first arc-shaped recesses is parallel to the length direction of the first core-pulling rod. The core-pulling assembly also includes a first spring plunger, which is mounted on the core-pulling slider and is used to engage with the two first arc-shaped concave holes. When the first limiting post abuts against the end of the first strip groove near the forming part, the first spring pin head plug engages with one of the first arc-shaped recesses; when the first limiting post abuts against the end of the first strip groove away from the forming part, the first spring pin head plug engages with the other of the first arc-shaped recesses. The second core-pulling rod has two second arc-shaped recesses spaced apart; the line connecting the centers of the two second arc-shaped recesses is parallel to the length direction of the second core-pulling rod. The core-pulling assembly also includes a second spring plunger, which is mounted on the core-pulling slider and is used to engage with the two second arc-shaped concave holes. When the second limiting post abuts against the end of the second strip groove near the forming part, the second spring pin head plug engages with one of the second arc-shaped recesses. When the second limiting post abuts against the end of the second strip groove away from the forming part, the second spring pin head plug engages with the other second arc-shaped recess.

2. The molding die for an injection molded part with a concave cavity according to claim 1, characterized in that: The core-pulling assembly also includes two limiting cover plates, which are fixedly installed on the core-pulling slider. The two limiting cover plates are respectively located above the first strip groove and the second strip groove to close the first strip groove and the second strip groove.

3. The molding die for the injection molded part with a concave cavity according to claim 1, characterized in that: Both the first channel and the second channel have polygonal cross-sectional shapes.

4. The molding die for an injection molded part with a concave cavity according to claim 1, characterized in that: The fixed mold is provided with a T-shaped groove, and the bottom of the core-pulling slider has a T-shaped structure that matches the T-shaped groove.

5. The molding die for an injection molded part with a concave cavity according to claim 1, characterized in that: The core-pulling assembly also includes an inclined guide post, which is fixedly installed on the moving mold and passes through the core-pulling slider. The inclined guide post drives the core-pulling slider to move during the mold opening and closing process.

6. The molding die for an injection molded part with a recessed cavity according to claim 5, characterized in that: The core-pulling slider is equipped with a water-carrying circuit, the inlet and outlet of which are located at the bottom of the core-pulling slider; both the inlet and outlet of the water-carrying circuit are connected to L-shaped connectors, and water pipes are connected to the L-shaped connectors. The mold is provided with two parallel, spaced-apart strip grooves for the installation of the L-shaped connector and the water pipe.

7. The molding die for the injection molded part with a concave cavity according to claim 1, characterized in that: The molding die for the injection molded part with the cavity further includes a straight ejector assembly for vertically ejecting the injection molded part; the straight ejector assembly includes a straight ejector pin and an ejector plate, the ejector plate is vertically movable and disposed below the fixed mold, the bottom of the straight ejector pin is fixed on the ejector plate, and the straight ejector pin passes through the fixed mold.

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