Transfer mold structure for preventing metal insert from sticking to mold

Abstract

The utility model provides a transfer mold structure for preventing a metal insert from sticking to a mold. The transfer mold structure comprises a lower mold plate, a lower mold insert block is mounted in the middle of the lower mold plate; the upper die plate is internally provided with an upper die insert block aligned with the two end surfaces of the upper die plate, and the upper die insert block is internally provided with a plurality of insert positioning sleeves; a cavity with openings in the two ends is formed in the mold base, and an ejector pin base plate is installed in the cavity; an ejector rod is mounted on the demolding device; the upper mold plate is a movable mold plate capable of being pushed out of the mold, after the insert is embedded, a plastic part adhered to the interior of the upper mold cavity can be pushed out of the mold cavity through the mold opening frame ejector rod, and therefore the problem that a thermosetting plastic product with a metal insert is adhered to the upper mold and cannot be normally demolded is solved.

Description

Technical Field

[0001] The invention relates to a transfer mold structure for preventing metal inserts from sticking to the mold. Background Art

[0002] like Fig. 9 and Fig.10 As shown in the figure, some thermosetting plastic products with many metal inserts have the special shape of plastic parts. In order to ensure the integrity of their appearance, the whole plastic part can only be placed in the upper mold when designing the parting surface. In addition, the plastic part has many metal inserts. Affected by the shrinkage of the plastic part, the whole plastic part is wrapped by the upper mold cavity. The pulling force of the lower mold is not enough to keep the plastic part on the lower mold, which causes the part to remain in the upper mold cavity and prevents the plastic part from being demolded normally. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a transfer mold structure for preventing metal inserts from sticking to the mold.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides a transfer mold structure for preventing metal inserts from sticking to the mold, comprising a lower mold plate; a lower mold insert block is installed in the middle of the lower mold plate; an upper mold plate, an upper mold insert block aligned with the two end surfaces of the upper mold plate is installed in the upper mold plate, and a plurality of insert positioning sleeves are installed in the upper mold insert block; a mold base, a cavity with two ends opened in the mold base, an ejector pad is installed in the cavity; and a mold ejector is installed on the ejector.

[0006] The lower mold insert and the ejector plate are respectively installed at the two ends of the mold base, and the upper mold plate is movably installed at the top of the mold base. The shapes of the opposite surfaces of the lower mold insert and the upper mold plate are respectively the same as the shapes of the two ends of the plastic part. A number of ejectors are evenly installed on the ejector plate, and the upper ends of the ejectors are placed in a number of ejector through holes processed in the lower mold insert. A threaded hole with the same specification as the external thread on the upper end of the metal insert is processed in the insert positioning sleeve;

[0007] The upper mold plate also includes a panel, which is movably connected to the top of the upper mold plate, and the upper end of the panel is fixed on a mold fixing seat of the machine tool.

[0008] The mold base includes a square iron with a square cavity processed inside. The upper and lower ends of the square iron are respectively fixed with a pad and a bottom plate. The lower template is fixed to the pad. The center of the bottom plate is processed with a circular through hole with a cross-sectional area smaller than that of the ejector pad.

[0009] The pad is processed with a through hole whose position and size are the same as the ejector pin through hole on the lower die insert.

[0010] A plurality of return rods are evenly installed on the edge of the ejector pad, and the top of the return rod passes through the pad and the lower template in turn and contacts the lower end surface of the upper template. The ejector pad is fixed with an ejector rod fixing plate by bolts, and the end surface of the ejector rod fixing plate that contacts the ejector pad is processed with countersunk through holes corresponding to the return rod and the ejector respectively.

[0011] A spring is installed between the push rod fixing plate and the backing plate.

[0012] Fixed guide pillars are evenly installed on the edge of the lower template, and the upper ends of the fixed guide pillars are movably installed in the through holes on the edge of the upper template. Several movable guide pillars are installed on the edge of the upper template, and the bottoms of the movable guide pillars are aligned with the upper template. The upper ends of the movable guide pillars extend out of the upper template and are movably connected to the panel.

[0013] The top of the lower mold insert extends out of the lower mold plate, and the shape and size of the lower mold insert and the groove at the lower end of the plastic part are the same.

[0014] The upper end surface of the lower mold insert is also processed with a plurality of grooves corresponding to the insert positioning sleeve, and the shape and size of the grooves are the same as the lower end of the metal insert.

[0015] The mold ejector includes a mold ejector fixing plate, and a plurality of mold frame ejectors are installed on one end surface of the mold ejector fixing plate. The positions of the mold frame ejectors correspond to the positions of the holes required to be embedded on the plastic part, and the diameter of the mold frame ejectors is smaller than the inner diameter of the insert positioning sleeve.

[0016] Both ends of the insert positioning sleeve are processed into countersunk heads.

[0017] The beneficial effect of the present invention is that the upper template is a movable template that can be pushed out of the mold. After the insert is inserted, the plastic part stuck in the upper mold cavity can be removed and pushed out of the mold cavity through the mold opening frame ejector, thereby solving the problem that the thermosetting plastic product with metal inserts sticks to the upper mold and cannot be demolded normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the mold structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the upper mold structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the lower mold structure of the present invention;

[0021] Figure 4 It is a schematic diagram of a one-time mold opening structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the secondary mold opening structure of the present invention;

[0023] Figure 6It is a schematic diagram of the out-of-mold taking-out structure of the present invention;

[0024] Figure 7 It is a schematic diagram of the mold opening frame structure of the present invention;

[0025] Figure 8 It is a schematic diagram of the ejection mold structure of the present invention;

[0026] Fig. 9 This is a schematic diagram of the structure after the plastic part is inlaid with the insert;

[0027] Fig.10 It is a schematic diagram of the metal insert structure;

[0028] Fig.11 It is a schematic diagram of the structure of the insert positioning sleeve of the present invention;

[0029] In the figure: 1- movable guide pillar, 2- fixed guide pillar, 3- return rod, 4- ejector, 5- bottom plate, 6- ejector pad, 7- ejector fixing plate, 8- spring, 9- square iron, 10- pad, 11- lower template, 12- lower mold insert, 13- upper template, 14- panel, 15- plastic part, 16- upper mold insert, 17- insert positioning sleeve, 18- metal insert, 19- machine tool upper mold fixing seat, 20- machine tool cylinder top column, 21- parallel pad, 22- mold frame ejector, 23- mold ejector fixing plate. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0031] A transfer mold structure for preventing metal inserts from sticking to a mold, comprising a lower mold plate 11; a lower mold insert block 12 is installed in the middle of the lower mold plate 11; an upper mold plate 13, an upper mold insert block 16 aligned with its two end surfaces is installed in the upper mold plate 13, and a plurality of insert positioning sleeves 17 are installed in the upper mold insert block 16; a mold base, a cavity with two ends opened in the mold base, an ejector pad 6 is installed in the cavity; and a mold ejector, a ejector rod is installed on the mold ejector;

[0032] The lower mold insert 12 and the ejector plate 6 are respectively installed at the two ends of the mold base, and the upper mold plate 13 is movably installed at the top of the mold base. The shapes of the opposite surfaces of the lower mold insert 12 and the upper mold plate 13 are respectively the same as the shapes of the two ends of the plastic part 15. A plurality of ejectors 4 are evenly installed on the ejector plate 6. The upper ends of the ejectors 4 are placed in a plurality of ejector through holes processed in the lower mold insert 12. A threaded hole with the same specification as the external thread on the upper end of the metal insert 18 is processed in the insert positioning sleeve 17.

[0033] The panel 14 is also included. The panel 14 is movably connected to the top of the upper template 13. The upper end of the panel 14 is fixed on the upper mold fixing seat 19 of the machine tool.

[0034] The mold base includes a square iron 9, in which a square cavity is processed. The upper and lower ends of the square iron 9 are respectively fixed with a pad 10 and a bottom plate 5. The lower mold plate 11 is fixed to the pad 10. The center of the bottom plate 5 is processed with a circular through hole with a cross-sectional area smaller than that of the ejector pad 6.

[0035] The backing plate 10 is processed with a through hole having the same position and size as the ejector pin through hole on the lower mold insert 12 .

[0036] A plurality of return rods 3 are evenly installed on the edge of the ejector pad 6. The top of the return rod 3 passes through the pad 10 and the lower template 11 in sequence and contacts the lower end surface of the upper template 13. The ejector pad 6 is fixed with an ejector rod fixing plate 7 by bolts. The end surface of the ejector rod fixing plate 7 that contacts the ejector pad 6 is processed with countersunk through holes corresponding to the return rod 3 and the ejector 4 respectively.

[0037] A spring 8 is installed between the push rod fixing plate 7 and the backing plate 10 .

[0038] Fixed guide pillars 2 are evenly installed on the edge of the lower template 11, and the upper ends of the fixed guide pillars 2 are movably installed in the through holes on the edge of the upper template 13. A number of movable guide pillars 1 are installed on the edge of the upper template 13, and the bottoms of the movable guide pillars 1 are aligned with the upper template 13. The upper ends of the movable guide pillars 1 extend out of the upper template 13 and are movably connected to the panel 14.

[0039] The top of the lower mold insert 12 extends out of the lower mold plate 11 , and the shape and size of the groove at the lower end of the lower mold insert 12 and the plastic part 15 are the same.

[0040] The upper end surface of the lower mold insert 12 is also processed with a plurality of grooves corresponding to the insert positioning sleeve 17 , and the shape and size of the grooves are the same as the lower end of the metal insert 18 .

[0041] The ejector includes a mold ejector fixing plate 23, on one end of which a plurality of mold frame ejector rods 22 are mounted. The positions of the mold frame ejector rods 22 correspond to the positions of the holes to be embedded on the plastic part 15, and the diameter of the mold frame ejector rods 22 is smaller than the inner diameter of the insert positioning sleeve 17.

[0042] Both ends of the insert positioning sleeve 17 are processed into countersunk heads.

[0043] Separate the upper template 13 from the panel 14, use the movable guide column 1 between the upper template 13 and the panel 14 for guiding and positioning, design the upper template 13 as a movable template that can be pushed out of the mold, and the upper template 13 can be taken out of the mold, and then use the parallel pad 21 and the external mold frame to open the mold. Fig.10 The plastic part stuck in the upper mold cavity is manually pushed out of the mold cavity by the downward pressure drop of the mold frame push rod 22, thereby solving the problem that the thermosetting plastic product with metal inserts sticks to the upper mold and cannot be demoulded normally.

[0044] Operation process: mold closing, filling, extrusion molding, mold opening, first mold opening, second mold opening, mold push-out. The mold opening sequence is: Figure 4 As shown, the panel 14 is pulled open by the die fixing seat 19 of the machine tool, and when the machine tool is pulled open to below the set space distance; Figure 5 As shown in FIG. 1 , the return rod 3 and the ejector rod 4 provided in the lower mold are ejected upwards under the action of the cylinder top column 20 of the machine tool, and the formed plastic part 15 and the upper mold plate 13 are ejected to a certain height at the same time; at this time, the plastic part 15 with the metal insert is adhered to the mold cavity of the upper mold plate 13, and then the upper mold plate 13 is manually taken out of the mold and placed as shown in FIG. Figure 6 The parallel shims 21 shown in the figure avoid the maximum shape of the plastic part 15, and the bottom is externally provided. Figure 7 The mold base shown, such as Figure 8 As shown, the ejector rod 22 on the mold frame 23 applies pressure to the insert positioning sleeve 17 to smoothly eject the plastic part 15 together with the metal insert 18 out of the mold cavity of the upper mold plate 13 .

Claims

1. A transfer mold structure for preventing metal inserts from sticking to the mold, comprising a lower mold plate (11), characterized in that: A lower mold insert (12) is installed in the middle of the lower mold plate (11); an upper mold insert (16) is installed in the upper mold plate (13) and is aligned with the two end surfaces thereof, and a plurality of insert positioning sleeves (17) are installed in the upper mold insert (16); a mold base, a cavity with two ends opened is provided in the mold base, and an ejector pad (6) is installed in the cavity; and a mold ejector is installed on the mold ejector; The lower mold insert (12) and the ejector pad (6) are respectively mounted at the two ends of the mold base, the upper mold plate (13) is movably mounted at the top of the mold base, the shapes of the opposing surfaces of the lower mold insert (12) and the upper mold plate (13) are respectively the same as the shapes of the two ends of the plastic part (15), a plurality of ejector pins (4) are evenly mounted on the ejector pad (6), the upper ends of the plurality of ejector pins (4) are placed in a plurality of ejector through holes machined in the lower mold insert (12), and a threaded hole of the same specification as the external thread of the upper end of the metal insert (18) is machined in the insert positioning sleeve (17); It also includes a panel (14), which is movably connected to the top of the upper template (13), and the upper end of the panel (14) is fixed on the upper mold fixing seat (19) of the machine tool.

2. The transfer mold structure for preventing metal inserts from sticking to the mold as claimed in claim 1, characterized in that: The die base comprises a square iron (9), a square cavity is machined inside the square iron (9), a pad (10) and a bottom plate (5) are respectively fixedly connected at the upper and lower ends of the square iron (9), a lower mold plate (11) is fixedly connected to the pad (10), and a circular through hole with a smaller cross-sectional area than the ejector pad (6) is machined at the center of the bottom plate (5).

3. The transfer mold structure for preventing metal inserts from sticking to the mold as claimed in claim 2, characterized in that: The pad (10) is machined with a through hole having the same position and size as the ejector pin through hole on the lower die insert (12).

4. The transfer mold structure for preventing metal inserts from sticking to the mold as claimed in claim 1, characterized in that: A plurality of return rods (3) are evenly mounted on the edge of the ejector pad (6); the tops of the return rods (3) pass through the pad (10) and the lower template (11) in sequence and contact the lower end surface of the upper template (13); a push rod fixing plate (7) is fixedly mounted on the ejector pad (6) by means of bolts; a countersunk through hole corresponding to the return rod (3) and the ejector (4) is processed on the end surface of the push rod fixing plate (7) that contacts the ejector pad (6).

5. The transfer mold structure for preventing metal inserts from sticking to the mold as claimed in claim 4, characterized in that: A spring (8) is installed between the push rod fixing plate (7) and the backing plate (10).

6. The transfer mold structure for preventing metal inserts from sticking to the mold as claimed in claim 1, characterized in that: Fixed guide pillars (2) are evenly installed on the edge of the lower template (11), and the upper ends of the fixed guide pillars (2) are movably installed in through holes on the edge of the upper template (13). A plurality of movable guide pillars (1) are installed on the edge of the upper template (13), and the bottoms of the movable guide pillars (1) are aligned with the upper template (13), and the upper ends of the movable guide pillars (1) extend out of the upper template (13) and are movably connected to the panel (14).

7. The transfer mold structure for preventing metal inserts from sticking to the mold as claimed in claim 1, characterized in that: The top of the lower mold insert (12) extends out of the lower mold plate (11), and the shape and size of the groove at the lower end of the lower mold insert (12) and the plastic part (15) are the same.

8. The transfer mold structure for preventing metal inserts from sticking to the mold as claimed in claim 7, characterized in that: The upper end surface of the lower mold insert (12) is also processed with a plurality of grooves corresponding to the insert positioning sleeve (17), and the shape and size of the grooves are the same as the lower end of the metal insert (18).

9. The transfer mold structure for preventing metal inserts from sticking to the mold as claimed in claim 1, characterized in that: The mold ejector comprises a mold ejector fixing plate (23), a plurality of mold frame ejector rods (22) are mounted on one end surface of the mold ejector fixing plate (23), the positions of the mold frame ejector rods (22) correspond to the positions of holes required to be embedded on the plastic part (15), and the diameter of the mold frame ejector rods (22) is smaller than the inner diameter of the insert positioning sleeve (17).

10. The transfer mold structure for preventing metal inserts from sticking to the mold as claimed in claim 1, characterized in that: Both ends of the insert positioning sleeve (17) are processed into countersunk heads.

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