Sprue pulling equipment of BMC (bulk molding compound) material molding injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses sprue pulling equipment of a BMC (bulk molding compound) material molding injection mold, which comprises an upper mold, a lower mold arranged on the lower side of the upper mold, a molding cavity formed inside the upper mold and the lower mold, and a sprue guide sleeve fixedly mounted on the upper side of the upper mold, sprue grooves are formed in the side surfaces of the upper mold and the lower mold; connecting grooves are formed in the inner walls of the sprue grooves; a cleaning assembly is arranged on the side face of the lower die and comprises a sprue puller, a connecting strip is arranged on the side face of the sprue puller, and a matching gear is arranged on the side face of the connecting strip. According to the sprue bush cleaning device, the sprue puller is driven by the gear to rotate, so that the cleaning block further cleans the inner wall of the sprue bush and scrapes away cakes, and the cleaning block is supported by the supporting cylinder and can be attached to the inner wall of the sprue bush or the inner wall of a sprue groove, so that the sprue bush can be electrically cleaned; cleaning can be completed only by blowing of an air gun manually, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a gate pulling device for a BMC material molding injection mold. Background Art

[0002] BMC material, whose Chinese name is bulk molding compound, is a semi-dry manufacturing intermediate material for molding glass fiber reinforced thermosetting products. BMC material is pre-mixed into a paste by unsaturated polyester resin, low shrinkage / low profile additives, initiators, internal mold release agents, mineral fillers, etc., and then thickeners, colorants, etc. are added. It is stirred with glass fibers of different lengths in a special material kettle for thickening process, and finally forms a bulk intermediate material, which can be used for molding and injection molding. BMC material has excellent electrical insulation properties, high mechanical properties, good heat resistance, flame retardancy, corrosion resistance, etc., especially has excellent molding characteristics such as good fluidity, low molding pressure, short molding time, and low molding temperature.

[0003] BMC thermosetting materials cannot be injected using hot runners, so cold runners are used for injection molding. The following problems will occur when cold runners are used for injection molding: the intersection of the gate sleeve and the runner (i.e., the material handle position) will cause severe shrinkage due to excessive material thickness. BMC thermosetting materials are relatively brittle. During ejection, the material handle at the intersection of the gate sleeve and the runner is likely to break due to shrinkage. The broken waste remains in the gate sleeve of the mold, causing the gate sleeve to be blocked. As a result, the rubber cannot be transported to the runner during the next injection molding, and workers are required to remove the waste, which is very troublesome and affects the normal production and manufacturing of the mold, thereby reducing production efficiency. To this end, we propose a gate pulling device for BMC material molding injection molds. Utility Model Content

[0004] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a gate pulling device for a BMC material molding injection mold.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a gate pulling device for a BMC material molding injection mold, comprising an upper mold, a lower mold is arranged on the lower side of the upper mold, a molding cavity is opened inside the upper mold and the lower mold, a gate guide sleeve is fixedly installed on the upper side of the upper mold, a gate groove is opened on the side of the upper mold and the lower mold, and a connecting groove is opened on the inner wall of the gate groove;

[0006] A cleaning assembly is provided on the side of the lower mold, and the cleaning assembly includes a pulling rod, a connecting strip is provided on the side of the pulling rod, a matching gear is provided on the side of the connecting strip, and the matching gear can drive the pulling rod to rotate, a matching block is provided on the side of the pulling rod, and a cleaning block is provided on the side of the pulling rod, and the cleaning block can scrape the inner side of the gate guide sleeve, and a supporting cylinder is provided on the side of the cleaning block, and the supporting cylinder can support the cleaning block;

[0007] An auxiliary module is arranged on the side of the pulling rod, the auxiliary module comprises a slot, a movable cleaning rod is arranged inside the slot, a movable extrusion rod is arranged on the side of the cleaning rod, and a push-pull electric push rod is arranged on the side of the extrusion rod.

[0008] Preferably, the cleaning assembly includes a pulling rod arranged on the side of the lower mold, a discharge groove is opened on the side of the lower mold, a protective block is fixedly sleeved on the side of the pulling rod, a connecting strip is fixedly installed on the side of the protective block, a mating gear is meshed on the side of the connecting strip, a mating motor is fixedly installed on the bottom side of the lower mold, and the mating block is movably sleeved on the bottom side of the pulling rod.

[0009] Preferably, the pulling rod is a circular rod with an I-shaped cross section, the connecting bar is a rectangular bar with a toothed cross section, and the matching block is a circular block with a convex circular groove on the side.

[0010] Preferably, the cleaning component also includes a movable groove mirrored on the side of the pulling rod, the cleaning block is movably installed inside the movable groove, the support tube is fixedly connected between the side of the cleaning block and the inside of the movable groove, a constraint groove is opened on the inner wall of the movable groove, and a connecting rod is movably installed inside the constraint groove.

[0011] Preferably, the cleaning block is a rectangular blade block, the supporting cylinder is a spring steel cylinder with a continuous "W"-shaped cross section, the restraining groove is a cylindrical groove, and the connecting rod is a round rod.

[0012] Preferably, the auxiliary module includes a slot opened on the bottom side of the pulling rod, the cleaning rod is mirror-imaged on the inner wall of the slot, a limit block is movably installed inside the cleaning rod, a support spring is fixedly connected between the side of the limit block and the inner wall of the cleaning rod, the extrusion rod is movably installed inside the slot, and the electric push rod is fixedly installed on the side of the mating block.

[0013] Preferably, the slot is a rectangular slot with one side being tapered, the cleaning rod is a cylindrical block with rectangular slots symmetrically opened on the side, and the extrusion rod is a rectangular rod with one side being tapered.

[0014] Beneficial Effects

[0015] The utility model provides a gate pulling device for a BMC material molding injection mold. It has the following beneficial effects:

[0016] (1) The gate pulling device of the BMC material molding injection mold is provided with a cleaning component. A pulling rod is extended into the inside of the gate guide sleeve to push and squeeze it for cleaning. At the same time, the pulling rod is driven by a gear to rotate, so that a cleaning block can further clean and scrape the inner wall of the gate guide sleeve to remove lumps. The cleaning block is supported by a support tube so that it can fit on the inner wall of the gate guide sleeve or the inner wall of the gate groove. In this way, the gate sleeve can be electrically cleaned, so that cleaning can be completed by blowing with a manual air gun, thereby improving production efficiency.

[0017] (2) The gate pulling device of the BMC material molding injection mold is provided with an auxiliary module. During the process of adjusting the inner wall of the gate guide sleeve, the pulling rod moves downward to the connection groove position when resetting. The pulling rod is driven to a suitable angle by the matching gear. The extrusion rod extrudes the cleaning rod and is constrained by the limited position block to slide and extrude inside the connection groove, thereby performing an extrusion and cleaning movement on the impurities inside the connection groove. After completion, cleaning can be completed by an air gun, which further facilitates cleaning, realizes automatic operation to avoid manual cleaning, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the local structure of the molding cavity of the utility model;

[0022] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0023] Figure 4 For this utility model Figure 3 The enlarged structural diagram at B in the middle;

[0024] Figure 5It is a partial structural schematic diagram of the connection groove of the utility model;

[0025] Figure 6 For this utility model Figure 5 The enlarged structural diagram at C in the middle;

[0026] Figure 7 For this utility model Figure 5 Enlarged structural diagram at D in the middle.

[0027] Legend:

[0028] 1. Upper mold; 2. Lower mold; 3. Molding cavity; 4. Gate guide sleeve; 5. Gate groove; 6. Connecting groove; 7. Pull rod; 8. Discharge groove; 9. Protective block; 10. Connecting strip; 11. Matching gear; 12. Matching motor; 13. Matching block; 14. Movable groove; 15. Cleaning block; 16. Constraint groove; 17. Connecting rod; 18. Support cylinder; 19. Slotting; 20. Cleaning rod; 21. Limit block; 22. Support spring; 23. Extrusion rod; 24. Electric push rod. DETAILED DESCRIPTION

[0029] 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 in 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.

[0030] A gate pulling device for BMC material molding injection mold, such as Figure 1 - Figure 7 As shown, it includes an upper mold 1, a lower mold 2 is arranged on the lower side of the upper mold 1, the upper mold 1 and the lower mold 2 are rectangular molds, and the upper mold 1 and the lower mold 2 are used together for injection molding, and a molding cavity 3 is opened inside the upper mold 1 and the lower mold 2, and the molding cavity 3 is a rectangular cavity, and the molding material is molded inside the molding cavity 3, and a gate guide sleeve 4 is fixedly installed at the upper center position of the upper mold 1, and the gate guide sleeve 4 is a funnel-shaped cylindrical sleeve, and the injection molding material is operated through the gate guide sleeve 4, and a gate groove 5 is opened on the side of the upper mold 1 and the lower mold 2 corresponding to the position of the gate guide sleeve 4, and the gate guide sleeve 4 is movably installed inside the gate groove 5, and the gate groove 5 is a cylindrical groove, and a connecting groove 6 that penetrates the upper mold 1 and the lower mold 2 to the molding cavity 3 is equidistantly opened on the inner wall of the gate groove 5, and the connecting groove 6 is located between the upper mold 1 and the lower mold 2, and the connecting groove 6 is a cylindrical groove for guiding the injection molding material;

[0031] Furthermore, a cleaning assembly is provided on the side of the lower mold 2, and the cleaning assembly includes a pulling rod 7 provided on the side of the lower mold 2, and the pulling rod 7 penetrates the lower mold 2 and extends to the inner position of the gate groove 5, the pulling rod 7 is a circular rod with an I-shaped cross-section, a discharge groove 8 is provided on the side of the lower mold 2, and the discharge groove 8 extends to the side position of the pulling rod 7, the discharge groove 8 is a trapezoidal groove, which is used to discharge clean impurity materials, and a protective block 9 is fixedly sleeved on the side of the pulling rod 7, and the protective block 9 is a circular ring block, and connecting strips 10 are fixedly installed in a circular array at equal intervals on the side of the protective block 9 and connected The strip 10 is fixedly connected to the side of the drawing rod 7. The connecting strip 10 is a rectangular strip with a toothed cross section. The connecting strip 10 forms a gear-like distribution on the side of the drawing rod 7. The protective block 9 protects the connecting strip 10 to prevent impurities from falling between the connecting strips 10. A matching gear 11 is meshed on the side of the connecting strip 10. The matching gear 11 is a circular gear. A matching motor 12 is fixedly installed on the bottom side of the lower mold 2 and the matching motor 12 is fixedly connected to the side of the matching gear 11. The matching motor 12 is an existing technology and will not be described in detail here. The matching motor 12 can drive the matching gear 11 The rotation and meshing movement of the connecting strip 10 causes the drawing rod 7 to rotate. A matching block 13 is movably sleeved on the bottom side of the drawing rod 7. The matching block 13 is a circular block with a convex circular groove on the side. A set of telescopic devices is connected to the lower side of the matching block 13, through which the matching block 13 can be driven to move up and down. A movable groove 14 is mirrored on the side of the drawing rod 7. The movable groove 14 is a rectangular groove. A cleaning block 15 is movably installed inside the movable groove 14. The cleaning block 15 is a rectangular knife block. The cleaning block 15 can slide inside the movable groove 14. A support cylinder 18 is symmetrically and fixedly connected inside the movable groove 14. The support cylinder 18 is a spring steel cylinder with a continuous "W"-shaped cross section. The support cylinder 18 provides elastic support for the cleaning block 15. A constraint groove 16 that passes through the pulling rod 7 is provided on the inner wall of the movable groove 14 corresponding to the support cylinder 18. The constraint groove 16 is a cylindrical groove. A connecting rod 17 is symmetrically and movably installed inside the constraint groove 16 and the connecting rod 17 is fixedly connected to the side position of the cleaning block 15. The connecting rod 17 is a round rod. The connecting rod 17 can slide inside the constraint groove 16 to constrain and guide the cleaning block 15.

[0032] An auxiliary module is arranged on the side of the drawing rod 7, and the auxiliary module includes a slot 19 opened on the bottom side of the drawing rod 7. The slot 19 is a rectangular slot with a tapered side. A cleaning rod 20 extending through the drawing rod 7 is arranged in a mirror image on the inner wall of the slot 19. The cleaning rod 20 is a cylindrical block with rectangular slots symmetrically opened on the side. The cleaning rod 20 can clear the inside of the connecting groove 6. A limit block 21 is movably installed inside the rectangular slot of the cleaning rod 20 and the limit block 21 is fixedly connected to the side position of the drawing rod 7. The limit block 21 is a rectangular block. Between the side of the limit block 21 and the inner wall of the rectangular slot of the cleaning rod 20, a cleaning rod 20 is provided. A support spring 22 is fixedly connected, and the support spring 22 is an existing technology and will not be described in detail here. The support spring 22 provides elastic support for the limit block 21 so that the two groups of cleaning rods 20 can move close to each other without being subjected to force. An extrusion rod 23 is movably installed inside the slot 19 and the extrusion rod 23 is attached to the side position of the cleaning rod 20. The extrusion rod 23 is a rectangular rod with a tapered side. The extrusion rod 23 can push and squeeze the cleaning rod 20. An electric push rod 24 is fixedly installed on the side of the matching block 13. The electric push rod 24 is an existing technology and will not be described in detail here. The electric push rod 24 can push the extrusion rod 23.

[0033] The working principle of this utility model:

[0034] When in use, under normal circumstances, the related structures of the pulling rod 7 remain non-operating, and the lower mold 2 moves as a whole. When lumps and blockages are generated inside the gate guide sleeve 4, the telescopic device pushes the matching block 13 to move upward, and at the same time, the matching motor 12 drives the matching gear 11 to mesh with the connecting strip 10 to drive the pulling rod 7 to rotate. The pulling rod 7 is constrained by the matching block 13, and the pulling rod 7 pushes and squeezes the inside of the gate guide sleeve 4 to clean. The synchronous cleaning block 15 is supported by the support tube 18 and fits on the inner wall of the gate guide sleeve 4. The pulling rod 7 drives the cleaning block 15 to rotate to further clean and scrape off the lumps. The connecting rod 17 slides in the constraint groove 16 to constrain the cleaning block 15 to prevent the cleaning block 15 from moving and deviating, so that the cleaning block 15 can also clean the inner wall of the gate groove 5. After cleaning, the pulling rod 7 is reset and continues to move downward, so that the agglomerated impurities accumulated inside the gate groove 5 fall into the discharge groove 8, and the upper side of the gate guide sleeve 4 is blown by an air gun so that the agglomerated impurities are discharged from the discharge groove 8.

[0035] When lumps form inside the connecting groove 6, the inside of the gate guide sleeve 4 is cleaned as above, and the pulling rod 7 is pulled to the position of the connecting groove 6 when it is reset. The gear 11 drives the pulling rod 7 to rotate and stop at an appropriate angle, and the electric push rod 24 pushes the extrusion rod 23 to slide and extrude the cleaning rod 20 inside the slot 19. When the cleaning rod 20 is constrained by the limit block 21, the supporting spring 22 is deformed, and the cleaning rod 20 is squeezed inside the connecting groove 6 for cleaning and dredging. Then the electric push rod 24 is reset so that the cleaning rod 20 is reset under the elastic support of the supporting spring 22. Similarly, after cleaning, an air gun is used to blow on the upper side of the gate guide sleeve 4 so that the agglomerated impurities are blown from the connecting groove 6 into the molding cavity 3, which is convenient for directly cleaning the agglomerated impurities after the upper mold 1 and the lower mold 2 are opened.

[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A gate pulling device for a BMC material molding injection mold, comprising an upper mold (1), a lower mold (2) is arranged on the lower side of the upper mold (1), a molding cavity (3) is provided inside the upper mold (1) and the lower mold (2), a gate guide sleeve (4) is fixedly installed on the upper side of the upper mold (1), a gate groove (5) is provided on the side of the upper mold (1) and the lower mold (2), and a connecting groove (6) is provided on the inner wall of the gate groove (5); Features: A cleaning assembly is arranged on the side of the lower mold (2), and the cleaning assembly includes a pulling rod (7), a connecting strip (10) is arranged on the side of the pulling rod (7), a matching gear (11) is arranged on the side of the connecting strip (10), and the matching gear (11) can drive the pulling rod (7) to rotate, a matching block (13) is arranged on the side of the pulling rod (7), a cleaning block (15) is arranged on the side of the pulling rod (7), and the cleaning block (15) can scrape the inner side of the gate guide sleeve (4), and a supporting tube (18) is arranged on the side of the cleaning block (15), and the supporting tube (18) can support the cleaning block (15); An auxiliary module is arranged on the side of the pulling rod (7), and the auxiliary module includes a slot (19). A movable cleaning rod (20) is arranged inside the slot (19), a movable squeezing rod (23) is arranged on the side of the cleaning rod (20), and a push-pull electric push rod (24) is arranged on the side of the squeezing rod (23).

2. The gate pulling device for a BMC material molding injection mold according to claim 1, characterized in that: The cleaning component includes a pulling rod (7) arranged on the side of the lower mold (2), a discharge groove (8) is opened on the side of the lower mold (2), a protective block (9) is fixedly sleeved on the side of the pulling rod (7), a connecting strip (10) is fixedly installed on the side of the protective block (9), a matching gear (11) is meshed on the side of the connecting strip (10), a matching motor (12) is fixedly installed on the bottom side of the lower mold (2), and a matching block (13) is movably sleeved on the bottom side of the pulling rod (7).

3. The gate pulling device for a BMC material molding injection mold according to claim 2, characterized in that: The drawing rod (7) is a circular rod with an I-shaped cross section, the connecting bar (10) is a rectangular bar with a toothed cross section, and the matching block (13) is a circular block with a convex circular groove on the side.

4. The gate pulling device for a BMC material molding injection mold according to claim 3 is characterized in that: The cleaning assembly also includes a movable groove (14) mirror-imaged on the side of the pulling rod (7), a cleaning block (15) movably mounted inside the movable groove (14), a support tube (18) fixedly connected between the side of the cleaning block (15) and the inside of the movable groove (14), a restraining groove (16) disposed on the inner wall of the movable groove (14), and a connecting rod (17) movably mounted inside the restraining groove (16).

5. The gate pulling device for a BMC material molding injection mold according to claim 4, characterized in that: The cleaning block (15) is a rectangular blade block, the supporting cylinder (18) is a spring steel cylinder with a continuous "W"-shaped cross section, the restraining groove (16) is a cylindrical groove, and the connecting rod (17) is a circular rod.

6. The gate pulling device for a BMC material molding injection mold according to claim 5, characterized in that: The auxiliary module includes a slot (19) provided on the bottom side of the pulling rod (7), a cleaning rod (20) mirror-image-arranged on the inner wall of the slot (19), a limit block (21) movably installed inside the cleaning rod (20), a support spring (22) fixedly connected between the side of the limit block (21) and the inner wall of the cleaning rod (20), an extrusion rod (23) movably installed inside the slot (19), and an electric push rod (24) fixedly installed on the side of the matching block (13).

7. The gate pulling device for a BMC material molding injection mold according to claim 6, characterized in that: The slot (19) is a rectangular slot with one side being tapered, the cleaning rod (20) is a cylindrical block with rectangular slots symmetrically opened on the side, and the squeezing rod (23) is a rectangular rod with one side being tapered.

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